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    <script>
        //let i=1
       // console.log(i++ + ++i +i)//1+3+3=7
       console.log(1>2&&3<2)//flase && 逻辑与（全部为真才真）
       console.log(3>2||5>4)//true ||逻辑或（一真为真）
       console.log()



    </script>
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